Find any numbers for which the rational expression is undefined.
A. r = 9
B. r = -9
C. r = 0
D. none
Answer: B
Mathematics
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Find all real numbers in the interval [0, 2?) that satisfy the equation.cos x cos(?/8) - sin x sin(?/8) = 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.One end of a pool is a vertical wall 15 ft wide. What is the force exerted on this wall by the water if it is 
deep? The density of water is 62.4 lb/ft3.
A. 15,000 lb B. 3740 lb C. 1870 lb D. 7490 lb
Mathematics
Provide an appropriate response.Solve for the variable: 3.4x = 27.2
A. 30.6
B. 23.8
C. 
D. 8
Mathematics
Write an equation for the ellipse.e = 
; foci at (7, 0), (-7, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics